Re: IEC-320 coupler in non-standard use

Greetings, Please note that IEC 950 and all its clones, specifies in Clause 2.3.8, last dashed paragraph: --SELV CIRCUITS shall not use connectors compatible with those specified in IEC 83 or IEC 320. Very straightforward requirement. It doesn't mention or imply any exclusions, so this applies

Re: IEC-320 coupler in non-standard use

Which brings up the question about whether central office DC supplies which in some countries or circumstances run up to 70 volts should be considered SELV circuits. We do not treat the central office supplies as SELV at Motorola. Isolation is provided in switching supplies as with ac mains

Re: IEC-320 coupler in non-standard use

Bob, At 01:31 PM 03/11/1998 -0500, you wrote: Which brings up the question about whether central office DC supplies which in some countries or circumstances run up to 70 volts should be considered SELV circuits. No, if they're over 60 V dc, they shouldn't. By definition, SELV must less than or

IEC-320 coupler in non-standard use

Greetings! I used to work for Lucent Power Systems which is a MAJOR supplier of DC-powering equipment for telecom systems. We used IEC-320 connectors in some of our products in non-AC roles. For instance: we used them as input connectors to rack-mounted DC-to-DC converters (input: 48Vdc;